Process of treating sewage



fication -UNITEDs'IaTEs PATENT OFFICE. i

JOHN W. WILsoN, or SAN bruco, CALIFORNIA.

rnocnss or i Application med' December To all whom t may con-cem:

citizen of the United States,.residing at San Diego,` in the county ofSan Diego and State of California, have invented a new an usefulImprovement in Processes' of Treating Sewage, of which the following isa speci- My invention relatesfto sewage treatment, and may beeliicientlycarried outby an arrangement of septic tanks an conduits known to thetrade 4as the triplex septic tank .the inhabitants of unit sewer system.One object of the invention is tp enable cities;l villages andcomthoroughly purify the harmless eliiuent resulting low cost, to thesewer main final disposal,y that is, into irrigation water, streams yormunities to other bodies of fresh or salt water or elsewhere. l

According to my invention, the'septlc or put'rid an -putrefiable ,sewageis passed from various premises totheir each and several septic tanks asshown in the accom# of my improved sewer'system;

nic

' houses which may bedwellings,

panying drawings in which:

Figure 1 is a-top plan view of one unit Fig. 2 is a yverticalsectional'view of the same; and,

Fig. 3 is a ing 'a system comprisin units in' connection wit main andseveral premises.

a plurality of such Referring to the drawings in which s iinn-ilaifdtters refer to similar parts in ythe several views', each unit,as shown in Fig. 2, comprises a relatively large cylindrical compartment A, relatively small second an third compartments Bv and C, aninlet ypipe D. ipe connections E and F, an outlet pipe or ranch G whichconnects with the sewer main, and a by-pass H which connects to thebranch pipe.

InF 3 ig. th'elletter I represents several factories, other premises orchemical laboratories or lach house sources of sewage, and be assumed tocomprise a source or putreiable sewage and asource septic sewage. Theletten-L `designates the sewer main-whichis commonltoieach house orremises I.

n the first compartment A Aof each septic" tank,A the incoming sewage isdethe sewage shown on drawings,

diagrammatic view illustratan ordinary sewer I may J of septi'c Kgofanti-J" 'rnA'rINe snwnen.

Specification of Letters Patent.

' Patented net eeieeo. 4, 191c. segnano. iat, e41,

-nietioally sealed aside from its connections Il'and F, and thereforemaintains the proper conditions for the next fam'ly of bacteria, knownas the anaerobic microbes or liquefying bacteria, under the conditionsmaintained in this vcompartment B, and because of the presence ofmicrobes, -further disintegration and iquefaction takes place untilfthe'third compartment G is rcachedthrou'gh connection 4F. The conditions ofcompartment C are suitablefor the further action of the anerobicbacteria contained therein, and in this comartment the completion of theliquefaction and purification takes place until the effluent is clearand harmless and is discharged through outlet'G. By ,the locations ofthe `'connections 1), .E, F,v and G, yas and the cylindrical shape ofthe compartments A, B, and 0, itis possible 'to obtain xthis result.

a sufficient these anaerobic The pipe connections D and G are approxthecompartment A, under the influence ofy theaerobic microbes or bacteria.The disintegrated sewage khen passes into the compartments B andvmicrobes reduce it to a liluid state.

By my invention I have reversed the methods heretofore in use, that is,instead of turning all sewage land drainage from various premisesdirectly into the sewers and moving 'the septic4 sewage",y andantiseptic sewage including Wcterbeing drained from vaioulfpremisea,then running It into a generalseptic tank or tanks; according-:tc

F were also on the same leve1 through the bottom of the tankl to avoidthe passage therethrough ofl any 'C where the Vanaerobic ict myinvention, a septic tank is installed at each of the several connectionH is provided for each septic tank,for by-passing all drainageof anantiseptic nature directly to the sewer along with the overflow throughthe connection G from the septic tank, as shown on drawing; therebyeliminating the antiseptic e'lements from the septic tank or tanks, andthus avoiding the consequent harmful eect of imperfect reduction andpurification of the sewage and making unnecessary the frequent cleaningout of septic tank or tanks at great trouble and expense.

In connection with my invention it is possible to measure the quantityof sewage to be treated at each house or premises, by water meter orotherwise; whereas, by former methods even though the quantity of sewagecould be measured at time of installation vof septic tank or tanks,subsequent additions to the city, village orcommunityl of new buildingswould soon affect the working balance of the septic tank or premises,and a by-pass .able sewage from a source-adj acent-to that of tanks, andtheir eiiciency would be decreased thereby. v

I claim: l The process of segregating and disposirllg of antisepticsewage and purifying putre said antiseptic sewage, consisting in conducting the putreable sewage into an influence that effects disintegrationof solid material present in the sewage, and retarding the solidmaterial during its disintegration, while allowing it freedom to floator sink; conducting the disintegrated materialy and liquid materialtogether into an influence that will effect liquefaction of thedisintegrated material; conducting the thus liqueed material and theprimarily liquid material, together, away from said influences, and thenconducting the antisepticrsewage into the presence of the liquefied and`primari-ly liquid eiiluent at a location out of the 45 presence of theputrefiable sewage.`

JOHN w. wiLsoN.

